Best method for calling Python from JavaScript in PS?

Hi all,

I'm looking to call an external Python script from my Javascript running inside PS. My js will pass python some sysvars and will need some data back.

Some intial examples invovled using the child_process() method from node.js worked in isolation, but not within PS. I'm starting to try out direct ajax calls based on this stackoverflow thread. Can anyone confirm if this is the correct/current best path forard?

https://stackoverflow.com/questions/13175510/call-python-function-from-javascript-code

thanks in advance, 

pete